C0663

Left Rear Wheel Speed Sensor B Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

ABS/ESP indicator is on
Unstable ABS operation
Problems with the traction control system
Activating the emergency system mode

Causes

Damaged wheel speed sensor
Sensor contamination
Open or shorted wiring harness
Contact corrosion
ABS module malfunction

How to Fix

Check the wheel speed sensor for damage
Clean the sensor from dirt
Check the wiring harness for opens and shorts
Check contacts for corrosion
If necessary, replace the sensor or wiring harness

Related codes

C0660 C0661 C0662 C0664